Would a wedding be "ruined" if there was no wedding cake? Or would the lack of wedding cake (or in this hypothetical situation, wedding cupcakes) be a hilarious story to tell at the 50th anniversary party? "We didn't have dessert at our wedding, grandbabies, because your aunt Kate, who was supposed to bring the cupcakes, stayed home and ate them all."
Let me put it another way: I have 300 hypothetical cupcakes on my kitchen table right now and I am hypothetically considering opening a hypothetical box to have JUST ONE. Possibly two. Is that wrong? Hypothetically, of course.